Biomedical Device Consultants and Laboratories of Colorado, LLC

Biomedical Device Consultants & Laboratories LLC

Benjamin McCloskey

Craig Weinberg

Steven Weinberg

Steady flow hydrodynamic performance testing is performed on a valved prosthesis mounted in a test conduit. The system is configured with prescribed test condition inputs into control software. Upon test initiation, a steady flow pump is activated and automatically adjusts its flow based on the software logic to meet the prescribed first test condition. During forward flow pressure drop testing, the flow pump is automatically adjusted to achieve and hold a particular flow rate. During back flow leakage testing, the steady flow pump is automatically adjusted to achieve and hold a particular differential pressure across the test prosthesis while a flow rate of the leakage flow is measured. After a first test condition has been achieved, the system control software then automatically adjusts the pump flow rate to meet a second test condition. This process then continues until all conditions set by software inputs are evaluated.

System for evaluation of prosthetic heart valves under steady hydrodynamic conditions

A fatigue testing system provides simultaneous cycle testing for a plurality of prosthetic devices under simulated physiological loading conditions. A plurality of sample holders containing test samples of prosthetic devices is positioned between a distribution chamber and a return fluid chamber to form an integrated test chamber. A reciprocating linear drive motor operates a rolling bellows diaphragm to cyclically pressurize fluid within the test chamber and drive the pressurized fluid through the prosthetic devices being tested. The test chamber defines a return flow conduit in fluid communication with each of the sample holders, the return fluid chamber, and the distribution chamber. Compliance chambers and throttle valves associated with each of the sample holders regulate the pressure gradient and back pressure across the prosthetic devices being tested.

Fatigue testing system for prosthetic devices

Prostheses are fatigue tested using an apparatus under simulated physiological loading conditions. A fluid housing defines an entrance chamber having fluid outflow ports and an exit chamber having opposing fluid inflow ports and a central flow conduit in communication with the entrance chamber and the exit chamber. A plurality of housing tubes into which prosthesis are deployed may extend between the fluid outflow and inflow ports. Alternatively, tubular prostheses may be connected directly between the inflow and outflow ports. A reciprocating linear drive pump having a flexible diaphragm is provided to cyclically pressurize fluid through a common closed loop within the fluid housing and drive the pressurized fluid through the prosthesis being tested. The test system is capable of rotation independent of the motor drive for accurate diameter measurements of all test samples at elevated frequencies.

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Evergreen, CO, United States of America

Benjamin McCloskey